MangaConverter

CBZ to AZW3, and the shortcut most people want

If you have a folder of CBZ files and a current Kindle, there is a good chance you do not need an AZW3 file at all. Amazon Send to Kindle accepts EPUB and converts it into AZW3 on its own servers, which means the file that lands on your device is already in the modern Kindle format. Converting your CBZ to EPUB here and sending that gets you the same end result as a local AZW3 conversion, using a path that works today.

We will be clear about the gap anyway, because you searched for it: we do not emit AZW3. Our outputs are EPUB, MOBI, CBZ and PDF, and the open source engine behind this site does not offer AZW3 as a target either. It is on the roadmap with a vote button, and this page explains where it stands rather than taking your upload and returning something else.

AZW3 output is coming soon

Not live yet. Convert the CBZ to EPUB for your Kindle model instead, and Send to Kindle converts it to AZW3 on arrival.

Vote for this on the roadmap

How to get a CBZ onto a modern Kindle

  1. Pick your Kindle model

    Choose your exact device in the list, a Paperwhite, a Colorsoft, a Scribe or an older model. The pages are then built for that panel, which is the part that actually determines how the comic looks. A Paperwhite is 1236 by 1648 and a Scribe 1860 by 2480, and a file sized for one is wrong on the other.

  2. Output EPUB, not MOBI

    For any Kindle that supports Send to Kindle with EPUB, this is the right choice. Amazon converts it to AZW3 at their end. MOBI is still here and still works, but it is the format Amazon itself retired from that pipeline in late 2022, so prefer EPUB unless your device is old.

  3. Send it to the device

    Email the EPUB to your Send to Kindle address, or use the Amazon web uploader, and it arrives converted. On a signed in account the finished file is also on the Reader Shelf, which the device browser can download with a six digit code.

  4. Or sideload CBZ for a comic app

    If you read in a third party comic reader rather than the Kindle reader, keep the CBZ output: it is the cleaned, resized page images in a plain archive, and it copies over USB without Amazon involved.

The honest recommendation

This page could have sold you a conversion. Instead: convert the CBZ to EPUB at your Kindle size and let Send to Kindle produce the AZW3. It works now, it is fewer steps, and the image quality decisions stay with you where they matter.

Sizing beats format

Most complaints about comics on a Kindle are about page dimensions and contrast, not about the container. Picking the right device profile does more for how the volume reads than choosing between EPUB, AZW3 and MOBI ever will.

Frequently asked questions

Can I convert CBZ to AZW3 on this site today?

No. We emit EPUB, MOBI, CBZ and PDF. AZW3 output has a roadmap card you can vote for. The EPUB route below reaches the same place for most people, which is why we lead with it.

So is there any real benefit to a local AZW3 file?

Occasionally. If you want to sideload over USB without going through Amazon at all, and you want the modern format rather than MOBI, a local AZW3 would be the way. For anyone using Send to Kindle, Amazon conversion makes it redundant.

Will Send to Kindle ruin my comic pages?

It should not, if the pages are already correctly sized. That is the argument for converting here first: you control the resolution, the greyscale handling and the cropping, and Amazon then changes the container rather than the images. Sending a raw CBZ or an unsized file is where quality gets lost.

Why does the engine not support AZW3 when it supports MOBI?

Because MOBI output goes through Amazon own KindleGen tool, which the engine calls. AZW3 appears inside that process as an internal detail rather than as something the engine exposes as a format you can pick. Offering a standalone AZW3 means building a new emit stage, which is why it is a roadmap item rather than a setting.

Which is better for manga on a Kindle, AZW3 or CBZ?

It depends on the app. The Kindle reader wants an EPUB or AZW3, and handles fixed layout comic pages well on current devices. A third party comic app wants the CBZ. Both are available here today, one directly and one via Send to Kindle.

Does this work on a Kindle Scribe or Colorsoft?

Yes, and both are in the device list with their real panel sizes, so the pages are built for the larger screens rather than upscaled from a Paperwhite file. Output EPUB and send it as above.

MangaConverter runs on Kindle Comic Converter (KCC), the open source engine. Its output formats are EPUB, MOBI, CBZ and PDF; AZW3 is not selectable and exists internally only as part of how MOBI files are produced. AZW3 output is a planned addition here, and this page will host it once it works.